ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value Measurements (Details) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
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Liabilities subject to fair value measurement: | ||||||||
Contingent consideration | [1] | $ 1,921 | $ 2,831 | |||||
Employment agreement award | [2] | 27,017 | 25,660 | |||||
Total | 28,938 | 28,491 | ||||||
Mezzanine equity subject to fair value measurement: | ||||||||
Redeemable noncontrolling interests | [3] | 10,564 | 10,232 | |||||
Fair Value, Inputs, Level 1 [Member] | ||||||||
Liabilities subject to fair value measurement: | ||||||||
Contingent consideration | [1] | 0 | 0 | |||||
Employment agreement award | [2] | 0 | 0 | |||||
Total | 0 | 0 | ||||||
Mezzanine equity subject to fair value measurement: | ||||||||
Redeemable noncontrolling interests | [3] | 0 | 0 | |||||
Fair Value, Inputs, Level 2 [Member] | ||||||||
Liabilities subject to fair value measurement: | ||||||||
Contingent consideration | [1] | 0 | 0 | |||||
Employment agreement award | [2] | 0 | 0 | |||||
Total | 0 | 0 | ||||||
Mezzanine equity subject to fair value measurement: | ||||||||
Redeemable noncontrolling interests | [3] | 0 | 0 | |||||
Fair Value, Inputs, Level 3 [Member] | ||||||||
Liabilities subject to fair value measurement: | ||||||||
Contingent consideration | [1] | 1,921 | 2,831 | |||||
Employment agreement award | [2] | 27,017 | 25,660 | |||||
Total | 28,938 | 28,491 | ||||||
Mezzanine equity subject to fair value measurement: | ||||||||
Redeemable noncontrolling interests | [3] | $ 10,564 | $ 10,232 | |||||
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